| 南极绕极流区中尺度涡动动能年际变化和转换机制 |
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| 引用本文： | 张文霞,孟祥凤.南极绕极流区中尺度涡动动能年际变化和转换机制[J].极地研究,2011,23(1):42-48. |
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| 作者姓名： | 张文霞 孟祥凤 |
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| 作者单位： | 中国海洋大学海洋环境学院物理海洋研究所,青岛,266100 |
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| 基金项目： | 国家自然科学基金，国家科学技术局项目 |
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| 摘 要： | 采用多种资料研究南大洋南极绕极流(Antarctic Circumpolar Current,ACC)区中尺度涡的年际变化规律及机制.通过分析网格化融合卫星海洋资料AVISO(Archiving,Validation and Interpretation of Satellites Oceanographic DATA...
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| 关 键 词： | 南极绕极流 中尺度涡 年际变化 斜压能量转化率 |
INTERANNUAL VARIABILITY OF THE MESOSCALE EDDY KINETIC ENERGY IN THE ANTARCTIC CIRCUMPOLAR CURRENT REGION AND ITS TRANSLATION MECHANISM |
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| Zhang Wenxia,Meng Xiangfeng.INTERANNUAL VARIABILITY OF THE MESOSCALE EDDY KINETIC ENERGY IN THE ANTARCTIC CIRCUMPOLAR CURRENT REGION AND ITS TRANSLATION MECHANISM[J].Chinese Journal of Polar Research,2011,23(1):42-48. |
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| Authors: | Zhang Wenxia Meng Xiangfeng |
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| Abstract: | Several dataset are used to study the interannual variability of the mesoscale eddies in the ACC (Antarctic Circumpolar Current) region. Analysis of AVISO data (Archiving, Validation and Interpretation of Satellites Oceanographic data) reveals that seasonal variability of EKE (Eddy Kinetic Energy) is barely discerniblein this area, but its interannual variability is significant. Analysis of zonalwind stress and the interannual abnormal event of SAM (Southern Annular Mode) shows that maximum/minimum of zonal wind stress occurs around 3 years ahead of EKE maximum/minimum, lag and strength of the EKE response depend on the strength of wind stress anomaly. In addition, we also use ECCO JPL temperature and salinity data to calculate the distribution of baroclinic energy conversion rate in the ACC region. Based on this we analyze the energy transfer between wind field and the background ocean in interannual time scales. Based on the above analysis, we consider that the interannual variability of the ACC mesoscale eddies is contributed to the SAM related wind stress, which causes the variation of ACC transport and tilt of isopycnal surface. And this causes the variation of baroclinic energy conversion rate from the background ocean to mesoscale eddy, leading to the interannual variability of mesoscale eddies. |
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| Keywords: | Antarctic Circumpolar Current mesoscale eddy interannual variability baroclinic energy conversion rate |
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